Abstract: Abstract: Objective To define the standardized uptake value ( SUV) and CT housefield unit in various normal organs of SD rat during 18 F-FDG PET /CT scanning． Method Drew the regions of interest ( ROI) on parenchymal organs in SD rats and analyzed the data of SUV and CT housefield unit． Result The SUV and CT housfield unit of normal organs in SD rats were correlated with their physiological and structure characteristics． Conclusion The results provided the reference for evaluation and semi quantify analysis in PET /CT imaging of SD rats．  

Key words: standardized uptake value, CT housefield unit, 18 F-FDG

摘要： 摘要: 目的测量正常SD 大鼠18 F-FDG PET /CT 显像重要器官的标准化摄取值( SUV) 与CT 值。方法对大鼠各 实质性脏器勾画感兴趣区( ROI) 测定SUV 值与CT 值，并进行分析研究。结果正常SD 大鼠重要器官的SUV 值 和CT 值与其生理及结构特性有关。结论该研究结果为SD 大鼠18 F-FDG PET /CT 图像质量评价及半定量评价提 供了参考依据。

关键词: 标准化摄取值, CT 值, 18 F-FDG